The servo had several functions, and served as:
- A communicator, which allowed Gary Seven to communicate with the Beta 5 Computer and initiate transport.
- A personal defense mechanism. It had both a stun setting, which made its target go into a hypnotic state open for suggestion, and a kill setting.
- A electronic manipulation device, which Gary Seven used to deactivate the force field keeping him in the brig of the USS Enterprise
- A mechanical manipulation device, with the ability to serve simple purposes such as unscrewing screws, and locking and unlocking doors.
The servo bears some similarity to Doctor Who's sonic screwdriver.
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